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An ultraviolet‐cured, pH‐sensitive membrane electrode for use in flow injection analysis
Author(s) -
del Mundo Florian R.,
Cardwell Terence J.,
Cattrall Robert W.,
Iles Peter J.,
Hamilton Ian C.
Publication year - 1989
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140010412
Subject(s) - flow injection analysis , electrode , ph meter , membrane , analytical chemistry (journal) , chemistry , buffer solution , polymer , ultraviolet , buffer (optical fiber) , chromatography , materials science , optoelectronics , detection limit , telecommunications , biochemistry , organic chemistry , computer science
The preparation of an epoxyacrylate, UV‐cured polymer membrane electrode for determining pH is described. This is based on the neutral carrier, tridodecylamine, and shows Nernstian behavior from pH 5 to 10. Interferences from cations in this range are negligible. The response of the electrode is very fast, reaching more than 90% of the equilibrium value in less than 1 second, which makes it very suitable for use in flow injection analysis (FIA). The application of the electrode to the determination of pH in flow injection analysis using a miniature flow cell is described, and the influence of the buffer capacity and pH of the carrier on the accuracy of the pH measurement is discussed. The FIA system has been applied to the determination of the acidity of some soil samples.